US2750272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of hard burned agglomerates of fine magnetite ore
Assignee: Allis Chalmers Corp
•
Filing: 1950-06-05
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Granted: 1956-06-12
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Expires: 1970-06-05
Abstract
No abstract record available.
Inventors
- 👤 Otto G Lellep
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:09
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/2413
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR MAKING HARD, POROUS, UNSINTERED, SEPARATE PELLETS OF IRON ORE FROM FINELY DIVIDED OXIDIC IRON ORE, SAID PROCESS COMPRISING THE STEPS OF MAKING MOIST GREEN PELLETS OF IRON ORE FROM SAID FINELY DIVIDED ORE, FORMING SAID GREEN PELLETS INTO A UNIFORMLY THICK GENERALLY HORIZONTAL, GAS-PERMEABLE LAYER OF PELLETS ON A SUPPORT, ESTABLISHING FIRST, SECOND AND THIRD GAS CONFINING ZONES, EFFECTING A FLOW OF MODERATELY HEATED GASES THROUGH SAID FIRST ZONE, EFFECTING A FLOW OF HIGHLY HEATED STRONGLY OXIDIZING GASES THROUGH SAID SECOND ZONE INDEPENDENTLY OF THE FIRST SAID FLOW AND EFFECTING A FLOW OF COOLING GASES THROUGH SAID THRID ZONE, TRANSLATING SAID LAYER OF PELLETS AS A BODY GENERALLY HORIZONTALLY SUC-
Claim 2
Dependent Claim
113 words
A PROCESS FOR MAKING HARD, POROUS, UNSINTERED, SEPARATE PELLETS OF IRON ORE FROM FINELY DIVIDED OXIDIC IRON ORE, SAID PROCESS COMPRISING THE STEPS OF MAKING MOIST GREEN PELLETS OF IRON ORE FROM SAID FINELY DIVIDED ORE, FORMING SAID GREEN PELLETS INTO A UNIFORMLY THICK GENERALLY HORIZONTAL, GAS-PERMEABLE LAYER OF PELLETS ON A SUPPORT, ESTABLISHING FIRST, SECOND AND THIRD GAS CONFINING ZONES, EFFECTING A FLOW OF MODERATELY HEATED GASES THROUGH SAID FIRST ZONE, EFFECTING A FLOW OF HIGHLY HEATED STRONGLY OXIDIZING GASES THROUGH SAID SECOND ZONE INDEPENDENTLY OF THE FIRST SAID FLOW AND EFFECTING A FLOW OF COOLING GASES THROUGH SAID THRID ZONE, TRANSLATING SAID LAYER OF PELLETS AS A BODY GENERALLY HORIZONTALLY SUC-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |